CN104811049A - Resonance circuit - Google Patents
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- CN104811049A CN104811049A CN201410043873.0A CN201410043873A CN104811049A CN 104811049 A CN104811049 A CN 104811049A CN 201410043873 A CN201410043873 A CN 201410043873A CN 104811049 A CN104811049 A CN 104811049A
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Abstract
The invention provides a resonance circuit. A resonance portion of the resonance circuit comprises a capacitance regulator (50). when a first control source (10) serves as a DC power supply and a second control source (70) serves as a load, the capacitance regulator (50) includes a first capacitance value; when the second control source (70) serves as the DC power supply and the first control source (10) serves as the load, the capacitance regulator (50) includes a second capacitance value; and the first capacitance value is greater than the second capacitance value, namely, the capacitance value of the capacitance regulator (50) changes with the energy flow direction in the circuit. Thus, different resonance circuits can be employed in different energy transmission processes, and bidirectional resonance of the resonance circuit is realized.
Description
Technical field
The present invention relates to circuit design field, particularly relate to a kind of resonant circuit.
Background technology
LLC has become the hot topic topology of current power electronics sector application at present, and it is with the soft recovery of the diode of rectification side, and former limit switching tube is soft open-minded, and the feature that low current turns off becomes the first-selection of high efficiency application.But LLC also has its corresponding shortcoming, current LLC circuit can only realize unidirectional LLC resonance, than resonant circuit as shown in Figure 1, in the resonant circuit of Fig. 1 can only be energy from left to right unidirectional delivery time, resonant circuit can realize resonance function.
Summary of the invention
Embodiments provide a kind of resonant circuit, can only the problem of unidirectional resonance in order to solve resonant circuit in prior art.
Provide a kind of resonant circuit in the embodiment of the present invention, comprising:
First chop section, the first incoming end of described first chop section and the second incoming end are connected to the two ends in the first control source 10;
Second chop section, the first incoming end of described second chop section and the second incoming end are connected to the two ends in the second control source 70;
Resonance portion, comprises inductance 20, electric capacity 30, transformer 40 and capacity regulator 50; Be connected to the 3rd incoming end of described first chop section after one end series capacitance 30 of the first winding of transformer 40 and inductance 20, the other end of the first winding of transformer 40 is connected to the 4th incoming end of described first chop section; Be connected to the 3rd incoming end of described second chop section after one end series capacitance adjuster 50 of the second winding of transformer 40, the other end of the second winding of transformer 40 is connected to the 4th incoming end of described second chop section;
Wherein, when the first control source 10 is DC power supply and second controls source 70 for load, capacity regulator 50 has the first capacitance, when the second control source 70 is DC power supply and first controls source 10 for load, capacity regulator 50 has the second capacitance, and described first capacitance is greater than described second capacitance.
The resonance portion of resonant circuit in embodiments of the present invention comprises capacity regulator 50, the difference that its capacitance flows to according to energy in circuit in fact and changing, thus make resonant circuit adopt different resonant circuits in different energy transfer processes, and then achieve the two-way resonance function of resonant circuit.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of resonant circuit of the prior art;
One of schematic diagram of the resonant circuit that Fig. 2 provides for the embodiment of the present invention one;
The schematic diagram two of the resonant circuit that Fig. 3 provides for the embodiment of the present invention one;
The schematic diagram three of the resonant circuit that Fig. 4 provides for the embodiment of the present invention one;
The schematic diagram four of the resonant circuit that Fig. 5 provides for the embodiment of the present invention one;
The schematic diagram five of the resonant circuit that Fig. 6 provides for the embodiment of the present invention one;
The schematic diagram six of the resonant circuit that Fig. 7 provides for the embodiment of the present invention one;
The equivalent structure schematic diagram of resonance portion in the resonant circuit that Fig. 8 provides for the embodiment of the present invention one;
The equivalent structure schematic diagram of resonance portion when load is zero load in the resonant circuit that Fig. 9 provides for the embodiment of the present invention one;
In the resonant circuit that Figure 10 provides for the embodiment of the present invention one, resonance portion is the equivalent structure schematic diagram of full load in load;
Current waveform figure in the resonant circuit one-period that Figure 11 provides for the embodiment of the present invention one;
The schematic diagram seven of the resonant circuit that Figure 12 provides for the embodiment of the present invention one
The schematic diagram eight of the resonant circuit that Figure 13 provides for the embodiment of the present invention one;
The schematic diagram nine of the resonant circuit that Figure 14 provides for the embodiment of the present invention one;
The schematic diagram ten of the resonant circuit that Figure 15 provides for the embodiment of the present invention one;
11 of the schematic diagram of the resonant circuit that Figure 16 provides for the embodiment of the present invention one;
The schematic diagram of the resonant circuit that Figure 17 provides for the embodiment of the present invention two.
Embodiment
A kind of resonant circuit is provided in the embodiment of the present invention, this resonant circuit achieves two-way resonance function, below by accompanying drawing and specific embodiment, technical solution of the present invention is described in detail, should be appreciated that concrete technical characteristic in the embodiment of the present invention and embodiment just to explanation instead of the restriction of technical solution of the present invention.
Embodiment one:
Be illustrated in figure 2 the schematic diagram of a kind of resonant circuit in the embodiment of the present invention, this circuit comprises:
First chop section, the first incoming end of this first chop section and the second incoming end are connected to the two ends in the first control source 10;
Second chop section, the first incoming end of this second chop section and the second incoming end are connected to the two ends in the second control source 70;
Resonance portion, comprises inductance 20, electric capacity 30, transformer 40 and capacity regulator 50; Be connected to the 3rd incoming end of this first chop section after one end series capacitance 30 of the first winding of transformer 40 and inductance 20, the other end of the first winding of transformer 40 is connected to the 4th incoming end of this first chop section; Be connected to the 3rd incoming end of this second chop section after one end series capacitance adjuster 50 of the second winding of transformer 40, the other end of the second winding of transformer 40 is connected to the 4th incoming end of this second chop section;
Wherein, when the first control source 10 is DC power supply and second controls source 70 for load, capacity regulator 50 has the first capacitance, when the second control source 70 is DC power supply and first controls source 10 for load, capacity regulator 50 has the second capacitance, and this first capacitance is greater than this second capacitance.
Preferably, this first capacitance is at least 3 times of this second capacitance.
Here it should be noted that the circuit structure of resonance portion is except can being the circuit structure in Fig. 2, it can also be the circuit structure in Fig. 3, in the circuit structure of Fig. 3, one end of inductance 20 connection transformer 40 first winding, and the other end of electric capacity 30 connection transformer 40 first winding.
Further, capacity regulator 50 specifically can have various ways, such as:
The first: as shown in Figure 4, it is in parallel that capacity regulator 50 specifically comprises the first electric capacity 80 and the first switch 90, first electric capacity 80 and the first switch 90; When the first control source 10 is DC power supply and second controls source 70 for load, the first switch 90 closes, and now the capacitance of capacity regulator 50 is equivalent to infinity; When the second control source 70 is DC power supply and first controls source 10 for load, the first switch 90 disconnects, and the first electric capacity 80 accesses resonance portion; Namely when first control source 10 be DC power supply and second control source 70 be load time capacity regulator 50 capacitance, be far longer than the capacitance of the capacity regulator 50 when the second control source 70 is DC power supply and the first control source 10 is load;
The second: as shown in Figure 5, capacity regulator 50 specifically comprises the second electric capacity 100a, the 3rd electric capacity 100b, second switch 110a and the 3rd switch 110b, wherein: the branch road that the second electric capacity 100a and second switch 110a is in series, branch circuit parallel connection in series with the 3rd electric capacity 100b and the 3rd switch 110b; When the first control source 10 is DC power supply and second controls source 70 for load, second switch 110a closes and the 3rd switch 110b disconnects, and the second electric capacity 100a accesses resonance portion; When the second control source 70 is DC power supply and first controls source 10 for load, second switch 110a disconnects and the 3rd switch 110b closes, the 3rd electric capacity 100b access resonance portion; The capacitance of the second electric capacity 100a is greater than the capacitance of the 3rd electric capacity 100b;
The third: as shown in Figure 6, adopt threephase switch, its principle is identical with capacity regulator 50 principle shown in Fig. 5, does not repeat them here.
The concrete structure of above-mentioned three kinds of capacity regulators 50 is only example, is not intended to limit the present invention.
Further, the first chop section and the second chop section specifically also can have various ways.
Such as shown in Fig. 7, the first chop section specifically comprises the first metal-oxide-semiconductor 120a, the second metal-oxide-semiconductor 120b, the 3rd metal-oxide-semiconductor 130a and the 4th metal-oxide-semiconductor 130b, wherein:
The branch road that first metal-oxide-semiconductor 120a and the second metal-oxide-semiconductor 120b is in series, the branch circuit parallel connection in series with the 3rd metal-oxide-semiconductor 130a and the 4th metal-oxide-semiconductor 130b, the two ends after parallel connection are respectively as the first incoming end of this first chop section and the second incoming end; Tie point between first metal-oxide-semiconductor 120a and the second metal-oxide-semiconductor 120b is as the 3rd incoming end of this first chop section, and the tie point between the 3rd metal-oxide-semiconductor 130a and the 4th metal-oxide-semiconductor 130b is as the 4th incoming end of this first chop section; The grid of the first metal-oxide-semiconductor 120a, the second metal-oxide-semiconductor 120b, the 3rd metal-oxide-semiconductor 130a, the 4th metal-oxide-semiconductor 130b is all connected to the drive circuit of switching frequency for controlling the first metal-oxide-semiconductor 120a, the second metal-oxide-semiconductor 120b, the 3rd metal-oxide-semiconductor 130a, the 4th metal-oxide-semiconductor 130b;
Second chop section, specifically comprises the 5th metal-oxide-semiconductor 150a, the 6th metal-oxide-semiconductor 150b, the 7th metal-oxide-semiconductor 160a and the 8th metal-oxide-semiconductor 160b, wherein:
The branch road that 5th metal-oxide-semiconductor 150a and the 6th metal-oxide-semiconductor 150b is in series, the branch circuit parallel connection in series with the 7th metal-oxide-semiconductor 160a and the 8th metal-oxide-semiconductor 160b, the two ends after parallel connection are respectively as the first incoming end of this second chop section and the second incoming end; Tie point between 5th metal-oxide-semiconductor 150a and the 6th metal-oxide-semiconductor 150b is as the 3rd incoming end of this second chop section, and the tie point between the 7th metal-oxide-semiconductor 160a and the 8th metal-oxide-semiconductor 160b is as the 4th incoming end of this second chop section; The grid of the 5th metal-oxide-semiconductor 150a, the 6th metal-oxide-semiconductor 150b, the 7th metal-oxide-semiconductor 160a, the 8th metal-oxide-semiconductor 160b is all connected to the drive circuit of switching frequency for controlling the 5th metal-oxide-semiconductor 150a, the 6th metal-oxide-semiconductor 150b, the 7th metal-oxide-semiconductor 160a, the 8th metal-oxide-semiconductor 160b.
Below the operation principle of the resonant circuit shown in Fig. 7 is described.
Resonant circuit in embodiments of the present invention can realize two-way resonance function, illustrates respectively below to these two processes.
Process one:
When first control source 10 as DC power supply and second control source 70 as load time, now energy flows to the second control source 70 from the first control source 10, the first switch 90 in capacity regulator 50 closes, now the first electric capacity 80 is shorted, be equivalent to access an infinitely-great electric capacity, the circuit structure of resonance portion is identical with the circuit structure in Fig. 1.
As long as it should be noted that and ensure that the switching frequency of the first metal-oxide-semiconductor 120a and the 4th metal-oxide-semiconductor 130b and the second metal-oxide-semiconductor 120b and the 3rd metal-oxide-semiconductor 130a in the first chop section equals the resonance frequency of resonance portion herein, the first metal-oxide-semiconductor 120a, the second metal-oxide-semiconductor 120b, the 3rd metal-oxide-semiconductor 130a, the 4th metal-oxide-semiconductor 130b can realize the effect of soft switching.It is identical with implementation procedure of the prior art that what it was concrete realize principle, just do not repeat unnecessary herein.
Because the first control source 10 is DC power supply, first chop section input DC power, output AC power source is to resonance portion, and the first incoming end of the first chop section and the second incoming end are as input, and the 3rd incoming end and the 4th incoming end are as output.And the second chop section now just controls the rectification circuit of source 70 end as second, the first incoming end of the second chop section and the second incoming end are as output, and the 3rd incoming end and the 4th incoming end are as output.
Process two:
When second control source 70 as DC power supply and first control source 10 as load time, now energy flows to the first control source 10 from the second control source 70, the first switch 90 in capacity regulator 50 disconnects, first electric capacity 80 place in circuit, because the capacitance of the first electric capacity 80 is less, alternating voltage impedance is comparatively large, and circuit now can not be equivalent to the resonant circuit of Fig. 1 again, but another kind of resonant circuit.
Because the second control source 70 is DC power supply, second chop section input DC power, output AC power source is to resonance portion, and the first incoming end of the second chop section and the second incoming end are as input, and the 3rd incoming end and the 4th incoming end are as output.And the first chop section now just controls the rectification circuit of source 10 end as first, the first incoming end of the first chop section and the second incoming end are as output, and the 3rd incoming end and the 4th incoming end are as input.
Below the resonance principle of resonant circuit in process two is described:
Transformer 40 in Fig. 7 can be equivalent to the combination of a magnetizing inductance 160 and an ideal transformer, suppose that the no-load voltage ratio of ideal transformer is 1:1, resonance portion shown in Fig. 7 just can be equivalent to the structure shown in Fig. 8, describes now the resonance principle of resonant circuit in process two in detail with the structure shown in Fig. 8.
Because load can exist multiple different situation, here the infinitely small two kinds of situations of equivalent resistance that is infinitely great to the equivalent resistance of load and load are described, and the situation of other load is all between both of these case.
When the equivalent resistance of load is infinitely great, be equivalent to load for unloaded, resonance portion structure can be reduced to structure as shown in Figure 9; When the equivalent resistance of load is infinitely small, being equivalent to load is short circuit, and resonance portion structure can be reduced to structure as shown in Figure 10.
In Fig. 9, when load is unloaded, in resonance portion, the first electric capacity 80 is connected with inductance 160, now can be obtained the harmonic period of resonant circuit by following formula:
Wherein, T
1the harmonic period of resonant circuit when sign load is zero load, f
1the resonance of resonant circuit when sign load is zero load, C
1characterize the capacitance of capacity regulator, i.e. the capacitance of the first electric capacity 80, L
2characterize the inductance value of the equivalent magnetizing inductance 160 of transformer.
When the 5th metal-oxide-semiconductor 150a in the second chop section in Fig. 7 and the 8th metal-oxide-semiconductor 160b conducting, the second winding of transformer 40 have input Stepped Impedance Resonators electric current, and the cycle of its input current just equals T
1(as shown in figure 11), if now control the ON time of the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b well, the electric current that the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b just can be made when turning off just in time to flow through the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b is non-forward current, so just can realize the soft switching of the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b.
As can be seen from the current sinusoidal oscillogram of Figure 11, if the turn-off time of the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b be more than or equal to T
1/ 2 and be less than or equal to T
1just can make the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b in anon-normal to switch off current.
In Figure 10, when load is short circuit, because electric capacity 30 is far longer than the first electric capacity 80, therefore in a resonant circuit the impedance of electric capacity 30 much smaller than the impedance of the first electric capacity 80, such electric capacity 30 just can be ignored the impact of resonant circuit, now inductance 20 and inductance 160 parallel connection in resonance portion, can obtain the harmonic period of resonant circuit by following formula:
Wherein, T
2characterize the harmonic period of resonant circuit during load short circuits, f
2characterize the resonance frequency of resonant circuit during load short circuits, C
1characterize the capacitance of capacity regulator, i.e. the capacitance of the first electric capacity 80, L
1characterize the inductance value of inductance 20, L
2characterize the inductance value of the equivalent magnetizing inductance 160 of transformer.
If the no-load voltage ratio of transformer 40 is N:1, the harmonic period T of resonant circuit during load short circuits
2can be obtained by following formula:
Wherein, N characterizes the ratio of the number of turn of the second winding and the number of turn of the first winding in transformer 40.
When the 5th metal-oxide-semiconductor 150a in the second chop section in Fig. 7 and the 8th metal-oxide-semiconductor 160b conducting, the second winding of transformer 40 have input Stepped Impedance Resonators electric current, and the cycle of its input current just equals T
2(as shown in figure 11), if now control the ON time of the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b well, the electric current that the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b just can be made when turning off just in time to flow through the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b is non-forward current, so just can realize the soft switching of the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b.
Foregoing description is is infinitely great for the equivalent resistance of load and the equivalent resistance of load is infinitely small two kinds of situations, and namely load is unloaded and load is two kinds of situations of short circuit.
Figure 11 be when load be unloaded and load short circuits resonant circuit current waveform figure, and under other loading condition the cycle of electric current all will be between these two cycles, be namely more than or equal to T
2and be less than or equal to T
1.
As long as when the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b turns off, the electric current flowing through the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b is non-forward current, just can realize the soft switching of switching tube.As can be seen from Figure 11 current sinusoidal oscillogram in, if the turn-off time of the shutoff of the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b be more than or equal to T
1/ 2 and be less than or equal to T
2just can realize the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b in anon-normal under any loading condition to switch off current, namely achieve soft switching.
Certainly in order to ensure that switching tube all can realize soft switching in any case in load, the duty cycle time of the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b is therefore necessarily required to be more than or equal to T
1/ 2 are less than or equal to T
2, T
2need to be more than or equal to T
1/ 2, the proportionate relationship that therefore the inductance value demand fulfillment of inductance 20 and inductance 160 is certain, that is: L
1=K × L
2, K>0, L
1characterize the inductance value of inductance 20, L
2characterize the inductance value of the equivalent magnetizing inductance 160 of transformer 40.
If the no-load voltage ratio of transformer 40 is N:1, the proportionate relationship of the inductance value demand fulfillment of inductance 20 and inductance 160 is
If the no-load voltage ratio of transformer 40 is 1:1, and T
2>=T
1/ 2, following relational expression can be obtained:
K >=1/3 can be drawn from above-mentioned relation formula.
It should be noted that in addition, in the application scenarios of reality, can according to the proportionate relationship between the inductance value of the loading condition design inductance 20 of reality and the inductance value of inductance 160, when minimum load state is not Light Condition, the value of K need not be more than or equal to 1/3.
When K >=1/3, the switching tube of resonant circuit can realize soft switching under the various states such as unloaded, fully loaded and short circuit.The duty cycle time D*T of certain switching tube is greater than and equals T
1/ 2 and be less than or equal to T
2.
Specifically, because duty ratio D can not be greater than 0.5, therefore the switch periods of the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b can not be less than T
1, namely switching frequency will control be less than 1/T
1when guarantee resonant circuit breaker in middle pipe soft switching.
Below in conjunction with Fig. 7 and Figure 11, the control procedure of each period breaker in middle pipe is described.
When t0 ~ t1 moment, the 5th metal-oxide-semiconductor 150a in second chop section and the 8th metal-oxide-semiconductor 160b conducting, now the second DC power supply controlling source 70 output generates AC power through the second chop section, and AC power flow into resonance portion, is flow back into the negative pole of power supply by transformer 40.
When t1 ~ D*T moment (D*T is herein the duty cycle time of switching tube), the electric current of transformer 40 is non-forward current, the any instant in t1 ~ D*T moment now can be selected to close the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b, the cut-off current of such 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b is non-forward current, thus achieve the soft switching of switching tube, reduce the turn-off power loss of switching tube, it also avoid the voltage stress that switching tube produces when forward big current turns off simultaneously.
After the D*T moment, the 5th metal-oxide-semiconductor 150a is adjusted according to the different of load from the control of the 8th metal-oxide-semiconductor 160b and the 6th metal-oxide-semiconductor 150b and the 7th metal-oxide-semiconductor 160a.
Specifically, when bearing power is larger, system works is in higher frequency, need a certain moment between D*T ~ t3 moment, drive the 6th metal-oxide-semiconductor 150b and the 7th metal-oxide-semiconductor 160a, now the non-forward current of resonance portion does not also return to zero, and such 6th metal-oxide-semiconductor 150b and the 7th metal-oxide-semiconductor 160a is in the process of opening, flow through the current commutation of the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b to the 6th metal-oxide-semiconductor 150b and the 7th metal-oxide-semiconductor 160a, continue resonance.
When next cycle, identical with the implementation procedure in above-mentioned cycle, just the 6th metal-oxide-semiconductor 150b and the 7th metal-oxide-semiconductor 160a turns off when non-positive current, and the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b opens the change of current, continues resonance.Follow-up all cycles perform by this circulation, just repeat no more herein.
When bearing power is less, system works is in lower frequency, need the suitable moment after the t3 moment, drive the 6th metal-oxide-semiconductor 150b and the 7th metal-oxide-semiconductor 160a, now the electric current of resonance portion returns to zero, and such 6th metal-oxide-semiconductor 150b and the 7th metal-oxide-semiconductor 160a is in the process of opening, electric current is opened from 0, be equivalent to Stepped Impedance Resonators, identical with the 8th metal-oxide-semiconductor 160b opening with the 5th metal-oxide-semiconductor 150a, continue resonance.
When next cycle, identical with the implementation procedure in above-mentioned cycle, just the 6th metal-oxide-semiconductor 150b and the 7th metal-oxide-semiconductor 160a turns off when non-positive current, and the 5th metal-oxide-semiconductor 150a and the 8th metal-oxide-semiconductor 160b electric current are opened from 0, continue resonance after Stepped Impedance Resonators.Follow-up all cycles perform by this circulation, just repeat no more herein.
Visible, provide the resonant circuit realizing two-way resonance in embodiments of the present invention, this in a resonant circuit, when the direction of energy transferring is different, in this resonant circuit, resonance portion circuit structure also adjusts accordingly, and the electric capacity namely accessing resonance portion changes.
Further, the first chop section can also be circuit structure as shown in figure 12 in embodiments of the present invention, specifically comprises the first metal-oxide-semiconductor 120a, the second metal-oxide-semiconductor 120b, the 4th electric capacity 140a and the 5th electric capacity 140b, wherein:
The branch road that first metal-oxide-semiconductor 120a and the second metal-oxide-semiconductor 120b is in series, the branch circuit parallel connection in series with the 4th electric capacity 140a and the 5th electric capacity 140b, the two ends after parallel connection are respectively as the first incoming end of this first chop section and the second incoming end; Tie point between first metal-oxide-semiconductor 120a and the second metal-oxide-semiconductor 120b is as the 3rd incoming end of this first chop section, and the tie point between the 4th electric capacity 140a and the 5th electric capacity 140b is as the 4th incoming end of this first chop section; The grid of the first metal-oxide-semiconductor 120a, the second metal-oxide-semiconductor 120b is all connected to the drive circuit for controlling the first metal-oxide-semiconductor 120a and the second metal-oxide-semiconductor 120b switching frequency.
If when there is certain proportionate relationship between the capacitance of the 4th electric capacity 140a in Figure 12 in the first chop section and the 5th electric capacity 140b and electric capacity 30,4th electric capacity 140a and the 5th electric capacity 140b can replace the function of electric capacity 30, and that is resonance portion can access electric capacity 30(as shown in figure 13).
Further, the second chop section can also be circuit structure as shown in figure 14 in embodiments of the present invention, specifically comprises the 5th metal-oxide-semiconductor 150a, the 6th metal-oxide-semiconductor 150b, the 6th electric capacity 180a and the 7th electric capacity 180b, wherein:
The branch road that 5th metal-oxide-semiconductor 150a and the 6th metal-oxide-semiconductor 150b is in series, the branch circuit parallel connection in series with the 6th electric capacity 180a and the 7th electric capacity 180b, the two ends after parallel connection are respectively as the first incoming end of this second chop section and the second incoming end; Tie point between 5th metal-oxide-semiconductor 150a and the 6th metal-oxide-semiconductor 150b is as the 3rd incoming end of this second chop section, and the tie point between the 6th electric capacity 180a and the 7th electric capacity 180b is as the 4th incoming end of this second chop section; The grid of the 5th metal-oxide-semiconductor 150a, the 6th metal-oxide-semiconductor 150b is all connected to the drive circuit of switching frequency for controlling the 5th metal-oxide-semiconductor 150a, the 6th metal-oxide-semiconductor 150b.
Further, second chop section can also be circuit structure as shown in figure 15 in embodiments of the present invention, specifically comprise the 5th metal-oxide-semiconductor 150a, the 6th metal-oxide-semiconductor 150b, the 6th electric capacity 180a, the 7th electric capacity 180b, the first diode 210a, the second diode 210b and the 4th switch 220, wherein:
Branch road three branch circuit parallel connection that 5th metal-oxide-semiconductor 150a and the 6th metal-oxide-semiconductor 150b branch road, the 6th electric capacity 180a and the 7th electric capacity 180b in series branch road, the first diode 210a and the second diode 210b in series is in series, the two ends after parallel connection are respectively as the first incoming end of this second chop section and the second incoming end; Tie point between 5th metal-oxide-semiconductor 150a and the 6th metal-oxide-semiconductor 150b is as the 3rd incoming end of this second chop section, and the tie point between the 6th electric capacity 180a and the 7th electric capacity 180b is as the 4th incoming end of this second chop section; The grid of the 5th metal-oxide-semiconductor 150a, the 6th metal-oxide-semiconductor 150b is all connected to the drive circuit of switching frequency for controlling the 5th metal-oxide-semiconductor 150a, the 6th metal-oxide-semiconductor 150b; One end of 4th switch 220 is connected to the tie point between the 6th electric capacity 180a and the 7th electric capacity 180b, and the other end of the 4th switch 220 is connected to the tie point between the first diode 210a and the second diode 210b.
When the first control source 10 is DC power supply and second controls source 70 for load, the 4th switch 220 closes; When the second control source 70 is DC power supply and first controls source 10 for load, the 4th switch 220 disconnects.
In addition, when the second control source 70 is specially the control source of two series connection, resonant circuit can also be as shown in figure 16.Circuit structure shown in Figure 16 increases by the 5th switch 230 at the architecture basics of Fig. 7, and the second winding of transformer 40 is double-bus structure, be connected to the 3rd incoming end of this second chop section after one end series capacitance adjuster 50 of the second winding of transformer 40, after other end series connection the 5th switch 230 of the second winding of transformer 40, be connected to the 4th incoming end of the second chop section; Second winding mid point joint of transformer 40 is connected to the tie point between two control sources of connecting.
When the first control source 10 is load and the second control source 70 is DC power supply, the first switch 90 and the 5th switch 230 all will disconnect; When first control source 10 be DC power supply and second control source 70 for load time, the first switch 90 and the 5th switch 230 all closed, now, the resonant circuit shown in Figure 16 can balance the voltage in the control source that two are connected in the second control source 70.
In figure 16, when the first control source 10 is DC power supply and second controls source 70 for load, the 7th metal-oxide-semiconductor 160a in second chop section and the 8th metal-oxide-semiconductor 160b just plays a role when rectification, and when the first control source 10 is load and the second control source 70 is DC power supply, the 7th metal-oxide-semiconductor 160a and the 8th metal-oxide-semiconductor 160b is without any effect.Therefore two diodes can be used to substitute the 7th metal-oxide-semiconductor 160a and the 8th metal-oxide-semiconductor 160b respectively.
Namely now, the second chop section, specifically comprises the 5th metal-oxide-semiconductor, the 6th metal-oxide-semiconductor, the first diode and the second diode, wherein:
5th metal-oxide-semiconductor and the 6th metal-oxide-semiconductor branch road in series, the branch circuit parallel connection formed with the first diode and the second Diode series, the two ends after parallel connection are respectively as the first incoming end of this second chop section and the second incoming end; Tie point between 5th metal-oxide-semiconductor and the 6th metal-oxide-semiconductor is as the 3rd incoming end of this second chop section, and the tie point between the first diode and the second diode is as the 4th incoming end of this second chop section.
Just illustrate the circuit structure in part first chop section and the second chop section in the above-described embodiments; certain those skilled in the art are to be understood that the concrete structure not limiting the first chop section and the second chop section in the embodiment of the present invention, as long as the simple change made based on the circuit structure provided in the embodiment of the present invention and the circuit structure obtained are also in embodiment of the present invention institute protection range.
In addition, above-mentioned in embodiments of the present invention metal-oxide-semiconductor also can be use insulated gate electrode transistor npn npn or carry out alternative metal-oxide-semiconductor with the switching device of the diode of separate configurations.
Embodiment two:
Additionally provide a kind of resonant circuit in embodiments of the present invention, as shown in figure 17, this resonant circuit comprises:
First chop section, the first incoming end of this first chop section and the second incoming end are connected to the two ends in the first control source 300;
Second chop section, comprises the first metal-oxide-semiconductor 310a, the second metal-oxide-semiconductor 310b, the first electric capacity 320a, the second electric capacity 320b, the first diode 330a, the second diode 330b and switch 340; Branch road three branch circuit parallel connection that first metal-oxide-semiconductor 310a and the second metal-oxide-semiconductor 310b branch road, the first electric capacity 320a and the second electric capacity 320b in series branch road, the first diode 330a and the second diode 330b in series is in series, two ends after parallel connection, as the first incoming end of this second chop section and the second incoming end, are connected to the two ends in the second control source 350; Tie point between first metal-oxide-semiconductor 310a and the second metal-oxide-semiconductor 310b is as the 3rd incoming end of this second chop section, and the tie point between the first electric capacity 320a and the second electric capacity 320b is as the 4th incoming end of this second chop section; First electric capacity 320a is equal with the capacitance of the second electric capacity 320b and in predetermined capacitance interval range; One end of switch 340 is connected to the tie point between the first electric capacity 320a and the second electric capacity 320b, and the other end of switch 340 is connected to the tie point between the first diode 330a and the second diode 330b;
Resonance portion, comprises inductance 360, the 3rd electric capacity 370 and transformer 380; Be connected to the 3rd incoming end of this first chop section after one end series connection the 3rd electric capacity 370 of the first winding of transformer 380 and inductance 360, the other end of the first winding of transformer 380 is connected to the 4th incoming end of this first chop section; One end of second winding of transformer 380 is connected to the 3rd incoming end of this second chop section, and the other end of the second winding of transformer 380 is connected to the 4th incoming end of this second chop section;
Wherein, when the first control source 300 is DC power supply and the second control source 350 is load, switch 340 closes, and when the second control source 350 is DC power supply and the first control source 300 is load, switch 340 disconnects.
Come in two kinds of situation to be below described the resonant circuit in embodiment two:
Situation one: when the first control source 300 is DC power supply and second controls source 350 for load, switch 340 closes, the first electric capacity 320a now in the second chop section and the second electric capacity 320b is inoperative, first metal-oxide-semiconductor 310a, the second metal-oxide-semiconductor 310b, the first diode 330a, the second diode 330b form full bridge rectifier, and the second chop section is equivalent to rectification circuit.Circuit structure now shown in Figure 17 can be equivalent to Fig. 1.
Situation two: when the first control source 300 is load and the second control source 350 is DC power supply, switch 340 disconnects, now DC power supply is converted to AC power by the second chop section, because the capacitance size of the first electric capacity 320a and the second electric capacity 320b is identical, and the capacitance of the first electric capacity 320a and the second electric capacity 320b is within the scope of predetermined capacitance, such as the capacitance of the first electric capacity 320a and the second electric capacity 320b can be the half of the capacitance of the first electric capacity 80 in embodiment one, the circuit structure now shown in Figure 17 can be equivalent to Figure 14.
The circuit structure of the first chop section in embodiment two is identical with the circuit structure of the first chop section in embodiment one, just repeats no more herein.
It should be noted that the selection of electric capacity, inductance, metal-oxide-semiconductor in embodiments of the present invention in addition, or the model of above-mentioned device is selected to carry out different option and installments according to different scenes.
The embodiment of the present invention additionally provides a kind of DC/DC converter, i.e. DC-DC converter, comprises any resonant circuit in above-described embodiment.
The embodiment of the present invention additionally provides a kind of uninterrupted power supply, comprises any resonant circuit in above-described embodiment.
Embodiment three:
The embodiment of the present invention additionally provides a kind of control method of resonant circuit as shown in Figure 2, comprising:
When the first control source that resonant circuit connects is DC power supply and the second control source is load, the capacitance of control capacitance adjuster is the first capacitance; When the second control source that resonant circuit connects is DC power supply and the first control source is load, the capacitance of control capacitance adjuster is the second capacitance;
Wherein, this first capacitance is greater than this second capacitance.
The control method that resonant circuit shown in Fig. 2 adopts the embodiment of the present invention to provide, can realize two-way resonance.
Preferably, when the second control source that resonant circuit connects is DC power supply and the first control source is load, this control method also comprises:
In each harmonic period of this resonant circuit, the turn-off time controlling the second chop section breaker in middle pipe of this resonant circuit is positioned at preset time period; This preset time period is the time period that this switching tube bears non-forward current.
Being turned off when bearing non-forward current by control switch pipe, the soft switching of switching tube can be realized.
Preferably, this preset time period is specially and is more than or equal to T
1/ 2 and be less than or equal to T
2time period; Wherein, T
1the harmonic period of this resonant circuit when sign load is zero load, T
2characterize the harmonic period of this resonant circuit during load short circuits, T
2>=T
1/ 2.
Wherein, the harmonic period T of this resonant circuit when load is zero load
1obtain especially by following formula:
Wherein, C
1characterize the capacitance of capacity regulator in the resonance portion of resonant circuit, L
2characterize the inductance value of the equivalent magnetizing inductance of transformer in the resonance portion of resonant circuit.
The harmonic period T of this resonant circuit during load short circuits
2obtain especially by following formula:
Wherein, C
1characterize the capacitance of capacity regulator in the resonance portion of resonant circuit, L
1characterize the inductance value of inductance in the resonance portion of resonant circuit, L
2characterize the inductance value of the equivalent magnetizing inductance of transformer in the resonance portion of resonant circuit, N characterizes the ratio of the number of turn of the second winding and the number of turn of the first winding in transformer in the resonance portion of resonant circuit.
Be positioned at by the turn-off time of control switch pipe and be more than or equal to T
1/ 2 and be less than or equal to T
2time period in, the soft switching of switching tube under arbitrary load can be realized.
In sum, adopt the scheme of the embodiment of the present invention, two-way resonance function can be realized, and the soft switching of the switching tube of chop section in resonant circuit can be realized.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable device, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable device is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (21)
1. a resonant circuit, is characterized in that, comprising:
First chop section, the first incoming end of described first chop section and the second incoming end are connected to the two ends in the first control source (10);
Second chop section, the first incoming end of described second chop section and the second incoming end are connected to the two ends in the second control source (70);
Resonance portion, comprises inductance (20), electric capacity (30), transformer (40) and capacity regulator (50); Be connected to the 3rd incoming end of described first chop section after one end series capacitance (30) of the first winding of transformer (40) and inductance (20), the other end of the first winding of transformer (40) is connected to the 4th incoming end of described first chop section; Be connected to the 3rd incoming end of described second chop section behind one end series capacitance adjuster (50) of second winding of transformer (40), the other end of the second winding of transformer (40) is connected to the 4th incoming end of described second chop section;
Wherein, when first control source (10) for DC power supply and second control source (70) for load time, capacity regulator (50) has the first capacitance, when second control source (70) for DC power supply and first control source (10) for load time, capacity regulator (50) has the second capacitance, and described first capacitance is greater than described second capacitance.
2. circuit as claimed in claim 1, it is characterized in that, described first capacitance is at least 3 times of described second capacitance.
3. circuit as claimed in claim 1, is characterized in that,
wherein, L
1characterize the inductance value of inductance (20), L
2characterize the inductance value of the equivalent magnetizing inductance of transformer (40), K>0, N characterize the ratio of the number of turn of the second winding and the number of turn of the first winding in transformer (40).
4. circuit as claimed in claim 3, is characterized in that, K >=1/3.
5. the circuit as described in as arbitrary in claim 1-4, is characterized in that, capacity regulator (50), specifically comprises the first electric capacity (80) and the first switch (90), the first electric capacity (80) and the first switch (90) in parallel;
When first control source (10) for DC power supply and second control source (70) for load time, the first switch (90) close; When second control source (70) for DC power supply and first control source (10) for load time, the first switch (90) disconnect.
6. the circuit as described in as arbitrary in claim 1-4, is characterized in that, capacity regulator (50), specifically comprises the second electric capacity (100a), the 3rd electric capacity (100b), second switch (110a) and the 3rd switch (110b), wherein:
Second electric capacity (100a) and second switch (110a) branch road in series, with the 3rd electric capacity (100b) and the 3rd switch (110b) branch circuit parallel connection in series;
When first control source (10) for DC power supply and second control source (70) for load time, closed and the 3rd switch (110b) of second switch (110a) disconnects; When second control source (70) for DC power supply and first control source (10) for load time, second switch (110a) disconnect and the 3rd switch (110b) close; The capacitance of the second electric capacity (100a) is greater than the capacitance of the 3rd electric capacity (100b).
7. the circuit as described in as arbitrary in claim 1-4, is characterized in that, described first chop section, specifically comprises the first metal-oxide-semiconductor (120a), the second metal-oxide-semiconductor (120b), the 3rd metal-oxide-semiconductor (130a) and the 4th metal-oxide-semiconductor (130b), wherein:
First metal-oxide-semiconductor (120a) and the second metal-oxide-semiconductor (120b) branch road in series, with the 3rd metal-oxide-semiconductor (130a) and the 4th metal-oxide-semiconductor (130b) branch circuit parallel connection in series, the two ends after parallel connection are respectively as the first incoming end of described first chop section and the second incoming end;
Tie point between first metal-oxide-semiconductor (120a) and the second metal-oxide-semiconductor (120b) is as the 3rd incoming end of described first chop section, and the tie point between the 3rd metal-oxide-semiconductor (130a) and the 4th metal-oxide-semiconductor (130b) is as the 4th incoming end of described first chop section.
8. the circuit as described in as arbitrary in claim 1-4, is characterized in that, described first chop section, specifically comprises the first metal-oxide-semiconductor (120a), the second metal-oxide-semiconductor (120b), the 4th electric capacity (140a) and the 5th electric capacity (140b), wherein:
First metal-oxide-semiconductor (120a) and the second metal-oxide-semiconductor (120b) branch road in series, with the 4th electric capacity (140a) and the 5th electric capacity (140b) branch circuit parallel connection in series, the two ends after parallel connection are respectively as the first incoming end of described first chop section and the second incoming end;
Tie point between first metal-oxide-semiconductor (120a) and the second metal-oxide-semiconductor (120b) is as the 3rd incoming end of described first chop section, and the tie point between the 4th electric capacity (140a) and the 5th electric capacity (140b) is as the 4th incoming end of described first chop section.
9. the circuit as described in as arbitrary in claim 1-4, is characterized in that, described second chop section, specifically comprises the 5th metal-oxide-semiconductor (150a), the 6th metal-oxide-semiconductor (150b), the 6th electric capacity (180a) and the 7th electric capacity (180b), wherein:
5th metal-oxide-semiconductor (150a) and the 6th metal-oxide-semiconductor (150b) branch road in series, with the 6th electric capacity (180a) and the 7th electric capacity (180b) branch circuit parallel connection in series, the two ends after parallel connection are respectively as the first incoming end of described second chop section and the second incoming end;
Tie point between 5th metal-oxide-semiconductor (150a) and the 6th metal-oxide-semiconductor (150b) is as the 3rd incoming end of described second chop section, and the tie point between the 6th electric capacity (180a) and the 7th electric capacity (180b) is as the 4th incoming end of described second chop section.
10. the circuit as described in as arbitrary in claim 1-4, it is characterized in that, described second chop section, specifically comprise the 5th metal-oxide-semiconductor (150a), the 6th metal-oxide-semiconductor (150b), the 6th electric capacity (180a), the 7th electric capacity (180b), the first diode (210a), the second diode (210b) and the 4th switch (220), wherein:
5th metal-oxide-semiconductor (150a) and the 6th metal-oxide-semiconductor (150b) branch road, the 6th electric capacity (180a) and the 7th electric capacity (180b) in series branch road, the first diode (210a) and the second diode (210b) in series branch road three branch circuit parallel connection in series, the two ends after parallel connection are respectively as the first incoming end of described second chop section and the second incoming end;
Tie point between 5th metal-oxide-semiconductor (150a) and the 6th metal-oxide-semiconductor (150b) is as the 3rd incoming end of described second chop section, and the tie point between the 6th electric capacity (180a) and the 7th electric capacity (180b) is as the 4th incoming end of described second chop section;
One end of 4th switch (220) is connected to the tie point between the 6th electric capacity (180a) and the 7th electric capacity (180b), and the other end of the 4th switch (220) is connected to the tie point between the first diode (210a) and the second diode (210b).
11. circuit as claimed in claim 1, is characterized in that, described second chop section, specifically comprise the 5th metal-oxide-semiconductor (150a), the 6th metal-oxide-semiconductor (150b), the 7th metal-oxide-semiconductor (160a) and the 8th metal-oxide-semiconductor (160b), wherein:
5th metal-oxide-semiconductor (150a) and the 6th metal-oxide-semiconductor (150b) branch road in series, with the 7th metal-oxide-semiconductor (160a) and the 8th metal-oxide-semiconductor (160b) branch circuit parallel connection in series, the two ends after parallel connection are respectively as the first incoming end of described second chop section and the second incoming end;
Tie point between 5th metal-oxide-semiconductor (150a) and the 6th metal-oxide-semiconductor (150b) is as the 3rd incoming end of described second chop section, and the tie point between the 7th metal-oxide-semiconductor (160a) and the 8th metal-oxide-semiconductor (160b) is as the 4th incoming end of described second chop section.
12. circuit as claimed in claim 1, is characterized in that, described second chop section, specifically comprise the 5th metal-oxide-semiconductor, the 6th metal-oxide-semiconductor, the first diode and the second diode, wherein:
5th metal-oxide-semiconductor and the 6th metal-oxide-semiconductor branch road in series, the branch circuit parallel connection formed with the first diode and the second Diode series, the two ends after parallel connection are respectively as the first incoming end of described second chop section and the second incoming end;
Tie point between 5th metal-oxide-semiconductor and the 6th metal-oxide-semiconductor is as the 3rd incoming end of described second chop section, and the tie point between the first diode and the second diode is as the 4th incoming end of described second chop section.
13. circuit as described in claim 11 or 12, is characterized in that, when second control source (70) be specially the control source of two series connection time, described circuit also comprises:
5th switch (230), is connected to the 4th incoming end of the second chop section after other end series connection the 5th switch (230) of the second winding of transformer (40); Second winding mid point joint of transformer (40) is connected to the tie point between described two control sources of connecting.
14. 1 kinds of resonant circuits, is characterized in that, comprising:
First chop section, the first incoming end of described first chop section and the second incoming end are connected to the two ends in the first control source (300);
Second chop section, comprises the first metal-oxide-semiconductor (310a), the second metal-oxide-semiconductor (310b), the first electric capacity (320a), the second electric capacity (320b), the first diode (330a), the second diode (330b) and switch (340); First metal-oxide-semiconductor (310a) and the second metal-oxide-semiconductor (310b) branch road, the first electric capacity (320a) and the second electric capacity (320b) in series branch road, the first diode (330a) and the second diode (330b) in series branch road three branch circuit parallel connection in series, two ends after parallel connection, as the first incoming end of described second chop section and the second incoming end, are connected to the two ends in the second control source (350); Tie point between first metal-oxide-semiconductor (310a) and the second metal-oxide-semiconductor (310b) is as the 3rd incoming end of described second chop section, and the tie point between the first electric capacity (320a) and the second electric capacity (320b) is as the 4th incoming end of described second chop section; First electric capacity (320a) is equal with the capacitance of the second electric capacity (320b) and in predetermined capacitance interval range; One end of switch (340) is connected to the tie point between the first electric capacity (320a) and the second electric capacity (320b), and the other end of switch (340) is connected to the tie point between the first diode (330a) and the second diode (330b);
Resonance portion, comprises inductance (360), the 3rd electric capacity (370) and transformer (380); Be connected to the 3rd incoming end of described first chop section after one end series connection the 3rd electric capacity (370) of the first winding of transformer (380) and inductance (360), the other end of the first winding of transformer (380) is connected to the 4th incoming end of described first chop section; One end of second winding of transformer (380) is connected to the 3rd incoming end of described second chop section, and the other end of the second winding of transformer (380) is connected to the 4th incoming end of described second chop section;
Wherein, when first control source (300) for DC power supply and second control source (350) for load time, switch (340) close, when second control source (350) for DC power supply and first control source (300) for load time, switch (340) disconnect.
15. 1 kinds of DC/DC converters, is characterized in that, comprise the resonant circuit as described in claim arbitrary in claim 1 ~ 14.
16. 1 kinds of uninterrupted power supplys, is characterized in that, comprise the resonant circuit as described in claim arbitrary in claim 1 ~ 14.
The control method of 17. 1 kinds of resonant circuits as claimed in claim 1, is characterized in that, comprising:
When the first control source that resonant circuit connects is DC power supply and the second control source is load, the capacitance of control capacitance adjuster is the first capacitance; When the second control source that resonant circuit connects is DC power supply and the first control source is load, the capacitance of control capacitance adjuster is the second capacitance;
Wherein, described first capacitance is greater than described second capacitance.
18. methods as claimed in claim 17, is characterized in that, also comprise:
When the second control source that resonant circuit connects is DC power supply and the first control source is load, in each harmonic period of described resonant circuit, the turn-off time controlling the second chop section breaker in middle pipe of described resonant circuit is positioned at preset time period; Described preset time period is the time period that described switching tube bears non-forward current.
19. methods as claimed in claim 18, it is characterized in that, described preset time period is specially and is more than or equal to T
1/ 2 and be less than or equal to T
2time period;
Wherein, T
1the harmonic period of described resonant circuit when sign load is zero load, T
2characterize the harmonic period of described resonant circuit during load short circuits, T
2>=T
1/ 2.
20. methods as claimed in claim 19, is characterized in that, the harmonic period T of described resonant circuit when load is zero load
1obtain especially by following formula:
Wherein, C
1characterize the capacitance of capacity regulator in the resonance portion of resonant circuit, L
2characterize the inductance value of the equivalent magnetizing inductance of transformer in the resonance portion of resonant circuit.
21. methods as claimed in claim 19, is characterized in that, the harmonic period T of described resonant circuit during load short circuits
2obtain especially by following formula:
Wherein, C
1characterize the capacitance of capacity regulator in the resonance portion of resonant circuit, L
1characterize the inductance value of inductance in the resonance portion of resonant circuit, L
2characterize the inductance value of the equivalent magnetizing inductance of transformer in the resonance portion of resonant circuit, N characterizes the ratio of the number of turn of the second winding and the number of turn of the first winding in transformer in the resonance portion of resonant circuit.
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| CN112106287B (en) * | 2019-12-17 | 2024-05-24 | 法雷奥新能源汽车(深圳)有限公司 | Resonant tank circuit and method for configuring a resonant tank circuit |
| TWI762415B (en) * | 2021-08-27 | 2022-04-21 | 大陸商中山旭貴明電子有限公司 | Buck-boost bidirectional DC-DC resonant converter and control method thereof |
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